It's a good movie. Very much in line with Shinkai Makoto's other works, although I wouldn't consider it his best. Of course it is his most mainstream oriented one, and calling it the Titanic of anime isn't that far off since it's a timeless romance story aimed at women but enjoyable enough for guys too. Plotwise it mostly reminded me of Hosoda Mamoru's The Girl Who Leapt Through Time, so if you have seen that you kind of know what to expect. And of course the movie boasts some of the most gorgeous animation ever.